The first valve (V1) opens in less than 1 second.
The second valve (V2) can be either a fast opening
valve which opens in less than 1 second or a
characterized opening valve which is adjustable
from 1 up to 30 seconds, at rated capacity.
The opening characteristic is factory set at
approximately 6 seconds at the following
measured at 80 % of rated capacity
30 mbar supply pressure
20 ° C
2,5 mbar pressure drop
no step pressure
Due to the influence of ambient temperature (-15 ...
60 ° C) the adjusted opening time of 6 seconds
measured at 80% of adjusted flow rate can vary +/-
Less than 1 second for both valves.
Maximum working frequency
VQ400M is equipped for maximal working
frequency of one cycle per minute.
Coils are suitable for permanent energizing.
Operational voltage range
The combination gas valve will function satisfactory
between 85% and 110% of the rated voltage.
Designed life time
Overview of designed life time is given in the table
Table 4 Number of cycles per model.
Number of cycles
CLASS "A" COMBINATION VALVES